When would be the right time to dig up and move a standard magnolia, 6′ tall?

Question

I will be moving home mid September and would dearly like to take it with me.

Answer 1

Magnolias have very wide root systems and it is probably hard to contain most of them. It might be easier to grow a new one from a cutting.

https://www.gardeningknowhow.com/ornamental/trees/magnolia/are-magnolia-roots-invasive.htm

https://www.gardeningknowhow.com/ornamental/trees/magnolia/propagating-magnolia-trees.htm

https://www.gardeningknowhow.com/ornamental/trees/tgen/moving-mature-trees.htm